BIRD'S EYE VIEW U.S. Defense Secretary Chuck Hagel flies over Kabul, Afghanistan, with his senior military assistant, Marine Corps Lt. Gen. Thomas D. Waldhauser, March 10, 2013. Hagel traveled to Afghanistan on his first trip as the 24th defense secretary to visit U.S. troops, NATO leaders and Afghan counterparts. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 924399-F-TGN94-502.jpg Photo Gallery